condition monitoring

typical questions on condition monitoring

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Here are answers to typical questions relating to the use of condition monitoring
 

Condition Monitoring (CM) who needs it ?

Everyone who is responsible for machinery but doesn't want to be responsible for lost production, wasted maintenance effort and unnecessary machine failures. This probably includes you.
 
 
We've tried CM, it didn't work

Major advances have been made in CM. Now there is a method that can be used on a wide range of machines, that's straightforward & easy to use and can find problems in advance of other techniques - often before permanent damage has occurred. That’s why we call our instruments  Machine Health Checkers (MHC).
 
 
It's too expensive & only for big companies
 
Think about the costs of a single hour of lost production or the replacement of a failed machine. Our customers typically recoup the cost of the equipment within a few months or even days ! That's why we have 1000’s of portable instruments in use worldwide in both small and large companies. We’ve got affordable products priced within your budget.
 
 
It takes too long & it's too complicated
 
True of other methods perhaps but with our unique Acoustic Emission (AE) approach it's simplicity itself. For most machines, attach the sensor, wait 15 seconds and read a number - if Distress(R) is greater than 10 there's a problem - what could be easier ?  And its all done without having to know shaft speeds or bearing details - there's nothing smarter on the market. (Distress(R) is a registered trademark of Holroyd Instruments Ltd)
 
 
It'll never work on my machines
 
Your process or machines may be special but they still use bearings - right?, If it turns between 0.25 rpm up to 1000+ we've got the unit for you. We're so sure we'll bring it to your site (mainland UK) and let you prove to yourself that you can monitor your machinery. Our instruments will even pick up subtle effects like intermittent oil starvation inside a plain bearing before its worn out!
 
 
Our machines are too slow to monitor
 
Our latest developments let you monitor machinery down to 0.25 rpm. That's 4 minutes per revolution and well beyond the capabilities of conventional CM technology - and its still easy to use. (Memo Pro / SloPoint only)
 
 
I've never heard of AE, isn't it the same as vibration
 
All engineers have heard of vibration and many have discovered its weaknesses the hard way. Make no mistake this is a quite different technology which has spun out of UK Aerospace developments.
 
 
I've already got sensors on my machines
 
Sensors for machinery protection such as temperature and overall vibration are aimed at catching catastrophic failures. They just aren't sensitive enough to let you get the full cost savings of CM.
 
 
We use external service providers for our condition monitoring
 
Maybe - but how much is this costing you and wouldn't you really like to be in control - checking the severity of problems and the effectiveness of repairs.
 
 
Its too noisy for it to work
 
That's the beauty of AE  it works at high frequency so you're immune to airborne sounds and vibrations from adjacent machines. You can even monitor bearings on machines which are naturally shaking (eg centrifuges and helicopters).
 
 
I need diagnostics
 
You’ve got it with AE-LAB (TM). This innovative software tool integrates with the MAC-Memo Pro to give you diagnostic information from the heart of your machine.

The power of Acoustic Emission (AE) lies in the fact that it directly detects the physical processes such as friction, impacts and metal removal which occur when machinery degrades. Because of this it can be applied to virtually all rotating machinery including those traditionally difficult areas such as slow speed machinery, plain bearings and complex gearboxes. The key to the success of AE in the industrial environment lies not only in its high sensitivity to machine faults, but also in its inherent immunity to audible noise and low frequency vibrations. Because of this, AE is ideally suited to the shop floor where the background levels of noise and vibration are likely to be high and variable.

Typical uses
 
■ Instantly categorises machines as 'OK' or 'Suspect'.
■ Rank 'Suspect' machines in terms of problem severity
■ 
Monitor the rate of degradation of 'Suspect' machines.
■ Set levels at which action needs to be taken.
 
 
AE gives you these important benefits:
 
■ Lower cost - both purchase and ownership costs.
■ Simpler to set-up - no need to feed in machine design details
■ Easier to interpret - common interpretation across different machines.
■Wider application - gearboxes, RE & plain bearings, slow speed etc..
 

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